I've been sexually active for 2-3 months now, and been having sex with my gf (unprotected). She's only had one previous partner and no history of STD's (her parents are doctors etc...).However, the head of my penis has some red bits and some skin is peeling off. It's quite sore to pull the skin back too. I don't have any pain peeing and sex is fine once my foreskin is retracted. My penis head also smells really bad, despite washing.What could it be, should I see my doctor, talk to the gf about it. Please reply....